netdev - [PATCH net-next 3/4] ipv6: Only act upon NETDEV_*_TYPE

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Date:	Thu,  3 Dec 2015 21:12:32 +0100
From:	Andrew Lunn <andrew@...n.ch>
To:	David Miller <davem@...emloft.net>
Cc:	Krzysztof Halasa <khc@...waw.pl>,
	Marek Lindner <mareklindner@...mailbox.ch>,
	netdev <netdev@...r.kernel.org>,
	"B.A.T.M.A.N" <b.a.t.m.a.n@...ts.open-mesh.net>,
	Andrew Lunn <andrew@...n.ch>
Subject: [PATCH net-next 3/4] ipv6: Only act upon NETDEV_*_TYPE_CHANGE if we have ipv6 addresses

An interface changing type may not have IPv6 addresses. Don't
call the address configuration type change in this case.

Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
 net/ipv6/addrconf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index d84742f003a9..d2ab0f89a8d8 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3287,7 +3287,8 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
 
 	case NETDEV_PRE_TYPE_CHANGE:
 	case NETDEV_POST_TYPE_CHANGE:
-		addrconf_type_change(dev, event);
+		if (idev)
+			addrconf_type_change(dev, event);
 		break;
 	}
 
-- 
2.6.2

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